Thread: GM Fix: High/Low Octane Map!
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Old 03-31-2010, 11:52 AM   #6
brtaus
 
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Join Date: Oct 2009
Location: Phoenix, AZ
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Quote:
Originally Posted by kdbolt70 View Post
Premium from Speedway, for example, is noticeably slower than Premium from Shell. Just my observation.


Circle K/QT premium is same way; I only use Chevron or Shell premium.
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